Engraving machine



FIG. 1 is a front view of an engraving machine with housing closed;

FIG. 2 is a rear view of the engraving machine of FIG. 1;

FIG. 3 is a left-side view of the engraving machine of FIG. 1;

FIG. 4 is a right-side view of the engraving machine of FIG. 1;

FIG. 5 is a top view of the engraving macine of FIG. 1; and,

FIG. 6 is a perspective view from the front-right corner of the engraving macine of FIG. 1. 

The ornamental design for an “engraving machine,” as shown and described. 